Image forming apparatus for forming image by reading document, control method of the image forming apparatus, and storage medium

Abstract

When a reading operation in a magnification setting is performed, an image at a position intended by a user can be magnified and output, and an output product intended by the user can be provided in a similar manner in either case of a regular size mode and an adjustable size mode while an efficient memory use is realized.

What is claimed is: 
     
       1. An image forming apparatus comprising:
 a reading unit configured to read a document to generate image data; 
 a processor and a memory storing computer code that, when executed by the processor, causes the image forming apparatus to function as: 
 a storage unit configured to store the image data generated by the reading unit; 
 a setting unit configured to perform a magnification setting for varying magnification of the image data stored in the storage unit; and 
 a control unit configured to, in the case where the setting unit performs the magnification setting and a document size to be read by the reading unit is able to be determined before reading, perform control to execute first processing for not writing image data of an entire page generated by the reading unit reading one page of a document in the storage unit but writing image data of only a portion necessary for an image after varying the magnification in response to the magnification setting in the storage unit, and in the case where the document size is not able to be determined before reading, perform control to execute second processing for writing image data of an entire page generated by the reading unit reading one page of the document in the storage unit. 
 
     
     
       2. The image forming apparatus according to  claim 1 , wherein the processor and the memory storing computer code that, when executed by the processor, further causes the image forming apparatus to function as:
 a clipping unit configured to clip image data of a necessary portion as an image after varying the magnification in response to the magnification setting from the image data stored in the storage unit by the second processing. 
 
     
     
       3. The image forming apparatus according to  claim 1 , wherein the processor and the memory storing computer code that, when executed by the processor, further comprising causes the image forming apparatus to function as:
 a selection unit configured to receive a selection of an output reference position of a document from a user, 
 wherein, in the case where a side of the document to be read earlier by the reading unit is selected by the selection unit as the output reference position, the control unit performs control to execute the first processing if the document size is not able to be determined before reading. 
 
     
     
       4. The image forming apparatus according to  claim 1 , wherein
 the reading unit is capable of simultaneously reading both sides of a document, and 
 in the case where both sides of the document are simultaneously read and the document size is not able to be determined before reading, the control unit performs control to execute the second processing on image data to be generated by reading a front surface of the document and to execute the first processing on image data to be generated by reading a rear surface of the document. 
 
     
     
       5. The image forming apparatus according to  claim 4 , wherein the processor and the memory storing computer code that, when executed by the processor, further causes the image forming apparatus to function as:
 a selection unit configured to receive a selection of an output reference position of a document from a user, 
 wherein, in the case where a side of a document to be read earlier by the reading unit is selected by the selection unit as the output reference position and both sides of the document are simultaneously read, the control unit performs control to execute the first processing on image data to be generated by reading a front surface of the document and to execute the second processing on image data to be generated by reading a rear surface of the document even if the document size is not able to be determined before reading. 
 
     
     
       6. The image forming apparatus according to  claim 1 , wherein, in the case where a size of a document in a main scanning direction is able to be determined and a size of the document in a sub-scanning direction is not able to be determined before the reading unit reads the document, the control unit performs control to write image data of only a portion necessary for an image after varying the magnification in response to the magnification setting in the storage unit regarding the main scanning direction and to write image data of an entire page in the storage unit regarding the sub-scanning direction. 
     
     
       7. A method for controlling an image forming apparatus including a reading unit configured to read a document to generate image data, a storage unit configured to store the image data generated by the reading unit, and a setting unit configured to perform a magnification setting for varying magnification of the image data stored in the storage unit, the method comprising:
 in the case where the setting unit performs the magnification setting and a document size to be read by the reading unit is able to be determined before reading, executing first processing for not writing image data of an entire page generated by the reading unit reading one page of a document in the storage unit but writing image data of only a portion necessary for an image after varying the magnification in response to the magnification setting in the storage unit; and 
 in the case where the setting unit performs the magnification setting and the document size is not able to be determined before reading, executing second processing for writing image data of an entire page generated by the reading unit reading one page of the document in the storage unit. 
 
     
     
       8. A non-transitory storage medium storing a program for causing a computer to execute a method for controlling an image forming apparatus including a reading unit configured to read a document to generate image data, a storage unit configured to store the image data generated by the reading unit, and a setting unit configured to perform a magnification setting for varying magnification of the image data stored in the storage unit, the method comprising:
 in the case where the setting unit performs the magnification setting and a document size to be read by the reading unit is able to be determined before reading, executing first processing for not writing image data of an entire page generated by the reading unit reading one page of a document in the storage unit but writing image data of only a portion necessary for an image after varying the magnification in response to the magnification setting in the storage unit; and 
 in the case where the setting unit performs the magnification setting and the document size is not able to be determined before reading, executing second processing for writing image data of an entire page generated by the reading unit reading one page of the document in the storage unit.